Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10727862 | Physics Letters A | 2013 | 5 Pages |
Abstract
The impact of alkali-metal (Li/Na/Cs) adsorption on work function of fullerenes C60 and C70 was investigated by first-principles calculations. After adsorption, the work functions of fullerenes C60 and C70 decrease distinctly and vary linearly with the electronegativity of the alkali metal elements, and the positions where the alkali atoms are adsorbed considerably influence the work functions. On the contrary, a vacancy defect elevates the work functions of the fullerenes C60 and C70. The variation in the work functions rests with variation in Fermi level (which are attributed to charge transfer) and variation in vacuum levels (which are attributed to the induced dipole moments). Moreover, alkali-metal adsorption can also improve the electric conductivity of a fullerene mixture of C60 and C70.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Hong Liang, Shunfu Xu, Weihui Liu, Yueqiang Sun, Xiangfa Liu, Xinqing Zheng, Sen Li, Qiang Zhang, Ziliang Zhu, Xiaochun Zhang, Chengguo Dong, Chun Li, Guang Yuan, Hitenori Mimura,